Abstract
The Timoshenko system is a very well-known model for vibrations of elastic beams, which is given by the coupling of two forces acting on the system: the shear force and the bending moment. In the non-isothermal case, that is, when the model is subject to the temperature variation, we consider the thermal effect acting on the whole system, that is, we propose a new thermoelastic Timoshenko system by coupling thermal laws on both the shear force and the bending moment under the Fourier’s law. Then, we show that such a fully thermoelastic system is exponentially stable without assuming equal wave speeds and also independent of any boundary conditions.
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Acknowledgements
The authors are very grateful to: (i) the anonymous referee for raising questions on “temperatures”, which made the authors improve (and correct) the previous version of the article up to the present one; (ii) the professors Jaime E. Muñoz Rivera, Ramon Quintanilla, and Reinhard Racke, for all helpful discussions and careful considerations on the modeling in thermoelasticity; (iii) the collaboration of Sandro B. Pinheiro (currently at the State University of Maringá, Brazil, as a Ph.D. student) for kindly dedicating time to draw Pictures 1 and 2.
Funding
A. H. Caixeta has been partially supported by the Brazilian Agency CAPES within the project “PNPD - UEL/Matemática Aplicada e Computacional” Scholarship Number 1622327. M. A. Jorge Silva has been partially supported by the CNPq Grant 441414/2014-1 and Fundação Araucária Grant 066/2019. Research of D. S. Almeida Júnior has been partially supported by the CNPq Grants 458866/2014-8 and 310423/2016-3, and PNPD/CAPES/INCTMAT/LNCC Grant 88887.351763/2019-00.
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Dedicated to Professor Jaime E. Muñoz Rivera on the occasion of his 60th birthday
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Alves, M.O., Caixeta, A.H., Jorge Silva, M.A. et al. On a Timoshenko system with thermal coupling on both the bending moment and the shear force. J. Evol. Equ. 20, 295–320 (2020). https://doi.org/10.1007/s00028-019-00522-8
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DOI: https://doi.org/10.1007/s00028-019-00522-8